Deluxe Megaphone with SirenER370Our 16 watt deluxe megaphone features a built-in switch selectable electronic alarm siren, pistol grip, press to talk switch, volume control, and shoulder strap. It is weatherproof. It uses eight C-batteries, which are not included. Specifications Wattage 16W Max. Effective 800 feet Powerful solid state megaphone Built-in switch selectable electronic alarm siren Pistol grip Press-to-talk switch Volume control Shoulder strap Durable weatherproof construction Operates on 8 "C" cells (not supplied) 9.1" Bell Diameter x 14.25" Long 3lbs, 4oz w/o batteries Quick Guide (pdf)